If the card was stacked tih enough quality and the extra hour was added before, then I think I could take it.

I.e. 5 hours would be OK if for WM29 they had Rock v Cena, Lesnar v HHH, Punk v Taker, Orton v Sheamus, Cara v Rey, Ryback v Show and a MITB match. They could get a good 3 and 1/2 hours of match time out of that, couple in entrances, a few of small matches (divas, IC, celeb) and some predictable adverts to fill the time.